Step 1: Attach the caster wheels (quantity 5) to the base of the chair by firmly pressing down on each wheel.
Step 2: Attach the seat post to the seat post cover and then attach both pieces to the base of the chair.
Step 3: Attach the back post to the back of the chair by using the Allen Wrench to screw in the back post screw (quantity 1).
Step 4: Attach the armrest to the arm bracket and secure in place using the arm width adjustment. Attach the arm width adjustment by placing the washers between the knob and the arm rest, twist to tighten into place.
Step 5: Attach the back post/entire back of the chair to the seat by sliding the back post into the mechanism and screw it into place with the back tight bolt and washers (quantity 3).
Step 6: Place the chair piece on the seat by gently placing the seat cushion onto the seat post and adjust the chair to your desired seat/back preference.
You can view the Assembly Instructions with photo examples here.